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National standards for steamfitting apprenticeship including suggestions for putting national standards into operation in local communities.

By National Joint Steamfitting Apprenticeship Committee..
Washington, U.S. Govt. Print. Off., 1939 .
v, 11 p. incl. facsims. , At head of title: United States Dept. of Labor ... Division of Labor Standards. 27 cm..

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Suggested local standards for training steamfitting apprentices, based on the National standards for steamfitting apprentship.

By National Joint Steamfitting Apprenticeship Committee..
Washington, U.S. Govt. Print. Off., 1940 .
ix, 15 p. , At head of title: United States Department of Labor. Frances Perkins, secretary. Division of Labor Standards. V. A. Zimmer, director. | Part I of Bulletin no. 28 has title: National standards for steamfitting apprenticeship. 27 cm..

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